Metal-Oxide Varistors (MOVs) Surface Mount Multilayer Varistors (MLVs) > AUML Series AUML Varistor Series RoHS Description The AUML Series of Multilayer Transient Surge Suppressors was specifically designed to suppress the destructive transient voltages found in an automobile. The most common transient condition results from large inductive energy discharges. The electronic systems in the automobile, for example, antilock brake systems, direct ignition systems, engine control, airbag control systems, wiper motor controls, and so on, are susceptible to damage from these voltage transients and thus require protection. The AUML transient suppressors have temperature independent suppression characteristics affording protection from -55ºC to 125ºC. The AUML suppressor is manufactured from semiconducting Size Table ceramics which offer rugged protection and excellent transient energy absorption in a small package. The devices Metric EIA are available in ceramic leadless chip form, eliminating lead 3216 1206 inductance and assuring fast speed of response to transient 3225 1210 surges. These Suppressors require significantly smaller space and land pads than Silicon TVS diodes, offering greater 4532 1812 circuit board layout flexibility for the designer. 5650 2220 Also see the Littelfuse ML, MLN, and MLE Series of Multilayer Suppressors. Applications Features • Suppression of • Provides on-board • AEC-Q200 compliant • High peak surge inductive switching transient voltage • RoHS Compliant current capability or other transient protection for ICs • Load Dump energy • Low Profile, compact events such as EFT and transistors rated per SAE industry standard chip and surge voltage at • Used to help achieve Specification J1113 size; (1206, 1210, 1812, the circuit board level electromagnetic • Leadless, surface and 2220 Sizes) • ESD protection for compliance of mount chip form • Inherent bidirectional components sensitive end products clamping • “Zero” Lead Inductance to IEC 61000-4-2 • Replace larger surface • No Plastic or epoxy (Level 4), MIL-STD- mount TVS Zeners in • Variety of energy packaging assures 883C, Method 3015.7, many applications ratings available better than 94V-0 and other industry • No temperature derating flammability rating specifications (See up to 125ºC ambient Also the MLE or MLN Series) Absolute Maximum Ratings • For ratings of individual members of a series, see Device Ratings and Specifications chart. Continuous AUML Series Units Steady State Applied Voltage DC Voltage Range (V ) 16, 18, 24, 48, 68 V M(DC) Transient Load Dump Energy, (W ) 1.5 to 25 J LD Jump Start Capability (5 minutes), (V ) 48 V JUMP Operating Ambient Temperature Range (T ) -55 to +125 OC A Storage Temperature Range (T ) -55 to +150 OC STG Temperature Coefficient (αV) of Clamping Voltage (V ) at Specified Test Current <0.01 %/OC C CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/25/19

Metal-Oxide Varistors (MOVs) Surface Mount Multilayer Varistors (MLVs) > AUML Series Device Ratings and Specifications Maximum Ratings (125°C) Specifications (25°C) Maximum Maximum Jump Start Maximum Clamping Load dump Nominal Voltage Test Cur- Standby Continuous Voltage Voltage (V ) at Test Part Number DC Voltage (5min) Energy rent@ 10mA DC Leakage Current (8C/20μs) (at 13V DC) V (DC) V W V V I V I M JUMP LD N (DC) N (DC) L C P (V) (V) (J) Min (V) Max (V) (μA) (V) (A) V18AUMLA1206 18 24.5 1.5 23 32 50 40 1.5 V18AUMLA1210 18 24.5 3 23 32 50 40 1.5 V18AUMLA1812 18 24.5 6 23 32 100 40 5.0 V16AUMLA2220N5 16 24.5 50 21.6@1mA 26.4@1mA 100@16V DC 42 10.0 V18AUMLA2220 18 24.5 25 23 32 200 40 10.0 V24AUMLA2220 24 24.5 25 32 39 200 60 10.0 V48AUMLA1812 48 24.5 6 54.5 66.5 100 90 5.0 V48AUMLA2220 48 24.5 25 54.6 66.5 200 105 10.0 V68AUMLA2220 68 24.5 25 77.2 94.4 200 135 10.0 NOTES: 1. Average power dissipation of transients not to exceed 0.1W, 0.15W, 0.3W and 1W for model sizes 1206, 1210, 1812, and 2220 respectively. 2. Load dump: Min. time of energy input 40ms, interval 60sec (the load dump time constant Td differs from the time constant of energy input; load dump rating for ISO 7637-2 pulse 5a, please contact Littelfuse. 3. Thermal shock capability per Mil-Std-750, Method 1051: -55ºC to 125ºC, 5 minutes at 25ºC, 25 Cycles: 15 minutes at each extreme. 4. For application specific requirements, please contact Littelfuse. 5. Only available in “S” package and max. non-repetitive surge current (8/20μs) is 5000A. Current, Energy and Power Derating Curve Peak Pulse Current Test Waveform for Clamping Voltage When transients occur in rapid succession, the average power dissipation is the energy (watt-seconds) per pulse 100 times the number of pulses per second. The power so UE L developed must be within the specifications shown on the A K V Device Ratings and Characteristics Table for the specific A E device. Certain parameter ratings must be derated at high F P 50 temperatures as shown below. T O N E C R 100 PE 0 T E 90 O1 TIME ALU 80 T1 TED V 7600 Figure 2 T2 A F R 50 0 = Virtual Origin of Wave O 1 T 40 T = Time from 10% to 90% of Peak N CE 30 T = Rise Time = 1.25 x T PER 20 FTIG1 U=R DEe 2c . a PFyOE TARimK C ePLUALMSPEIN CGU RVROELTNATG TEEST WAVEFORM 10 2 Example - For an 8/20μs Current Waveform: 0 -55 50 60 70 80 90 100 110 120 130 140 150 O1 = VI8RμTUsA =L TO1R I=G IRN iOsFe W TAimVEe Figure 1 AMBIENT TEMPERATURE (oC) t1t == TVIIM2R0ETU μFAsRL O= FM RT 1O20 N=%T TDTOIeM 9cE0a %=y 1 OT.2iF5m PxeE tAK FIGURE 1. CURRENT, ENERGY AND POWER DERATING t2 = VIRTUAL TIME TO HALF VALUE CURVE (IMPULSE DURATION) EXAMPLE: FOR AN 8/20 s CURRENT WAVEFORM 8 s = t1 = VIRTUAL FRONT TIME 20 s = t2 = VIRTUAL TIME TO HALF VALUE © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/25/19

Metal-Oxide Varistors (MOVs) Surface Mount Multilayer Varistors (MLVs) > AUML Series Maximum Leakage Current/Clamping Voltage Curve for Temperature Effects AUML Series at 25ºC In the leakage region of the AUML suppressor, the device characteristics approaches a linear (ohmic) relationship MAXIMUM LEAKAGE MAXIMUM CLAMPING VOLTAGE and shows a temperature dependent affect. In this region 100 1210/1206 the suppressor is in a high resistance mode (approaching 12821220 106Ω) and appears as a near open-circuit. Leakage currents at maximum rated voltage are in the microamp range. MAXIMUM LEAKAGE MAXIMUM CLAMPING VOLTAGE 100 VOLTAGE10 1210/112282012260 112282112020/1206 Wtheh e1n0 mclAam rapningge )t,r athnes iAenUtMs aLt shuigphperer scsuorrr eanptpsr o(aatc ahneds above a 1-10 characteristic. In this region the characteristics GE 1210/1206 of the AUML are virtually temperature independent. VOLTA10 12821220 Figure 3 shows the typical effect of temperature on 1 the V-I characteristics of the AUML suppressor. 10µA 100µA 1mA 10mA 100mA 1A 10A 100A Figure 3 CURRENT FIGURE 2.MAXIMUM LEAKAGE CURRENT/CLAMPING VOLTAGE CURVE FOR AUML SERIES AT 25oC 1 Load Dump Energy Capability 10µA 100µA 1mA 10mA 100mA 1A 10A 100A Typical V-I Characteristics of thCUeRR VEN1T8AUMLA2220 at -40ºC, A Load Dump transient occurs when the alternator load 21050ºC, F8IG5URºEC 2. MaAnXIMdU M1 L2EA5KAºGCE CURRENT/CLAMPING VOLTAGE CURVE FOR AUML SERIES AT 25oC in the automobile is abruptly reduced. The worst case scenario of this transient occurs when the battery is disconnected while operating at full rated load. There 100 are a number of different Load Dump specifications in OLTAGE10 -4205ooCC ecoximstmenocne o inn et hbee ianugt othmaot trieveco inmdmusetnryd,e wd ibthy tthhee mSoocsite ty of V Automotive Engineers, specification #SAE J1113. Because OLTAGE10 182-425505ooooCCCC oLfit ttehlefu dsiev edresfiitny eosf tthhee sLeo aLdo aDdu Dmupm epn esprgeyc icfiacpaatiboinlitsy of V 1 the AUML suppressor range as that energy dissipated by 1µA85oC10µA 100µA 1mA 10mA 100mA 1A 10A 100A 1000A CURRENT the device itself, independent of the test circuit setup. 125oC The resultant Load Dump energy handling capability 1 FIGU1RµEA 3.TYPI1C0AµLA V-I CH1A0R0AµCATERIST1ImCAS OF TH1E0 Vm1A8AUML1A0202m2A0 at -40o1CA, 25oC, 851o0CA AND 12150o0CA 1000A serves as an excellent figure of merit for the AUML Figure 4 CURRENT suppressor. Standard Load Dump specifications require a device capability of 10 pulses at rated energy, across FIGURE 3.TYPICAL V-I CHARACTERISTICS OF THE V18AUMLA2220 at -40oC, 25oC, 85oC AND 125oC a temperature range of -40ºC to +125ºC. This capability requirement is well within the ratings of all of the AUML Series (Figure 6 on next page). The very high energy absorption capability of the AUML suppressor is achieved by means of a highly controlled manufacturing process. This technology ensures that a large volume of suppressor material, with an interdigitated layer construction, is available for energy absorption in an extremely small package. Unlike equivalent rated Silicon TVS diodes, the entire AUML device volume is available to dissipate the Load Dump energy. Hence, the peak temperatures generated by the Load Dump transient are significantly lower and evenly dissipated throughout the complete device (Figure 5 below). This even energy dissipation ensures that there are lower peak temperatures generated at the P-N grain boundaries of the AUML suppressor. There are a number of different size devices available in the AUML Series, each one with a load dump energy rating, which is size dependent. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/25/19

Metal-Oxide Varistors (MOVs) Surface Mount Multilayer Varistors (MLVs) > AUML Series Speed of Response Explanation of Terms The clamping action of the AUML suppressor depends Maximum Continuous DC Working Voltage (V ) M*(DC)++ on a conduction mechanism similar to that of other This is the maximum continuous DC voltage which may semiconductor devices (that is P-N Junctions). The be applied, up to the maximum operating temperature apparent slow response time often associated with (125ºC), to the ML suppressor. This voltage is used as the transient voltage suppressors (Zeners, MOVs) is often due reference test point for leakage current and is always less to parasitic inductance in the package and leads of the than the breakdown voltage of the device. device and less dependent of the basic material (Silicon, Z O). Thus, the single most critical element affecting the N Load Dump Energy Rating W response time of any suppressor is its lead induc-tance. LD+ The AUML suppressor is a surface mount device, with no This is the actual energy the part is rated to dissipate leads or external packaging, and thus, it has virtually zero under Load Dump conditions (not to be confused with the inductance. The actual response time of a AUML surge "source energy" of a Load Dump test specification). suppressor is in the 1 to 5 ns range, more than sufficient for the transients which are likely to be encountered in an Maximum Clamping Voltage V automotive environment. C+ This is the peak voltage appearing across the suppressor when measured at conditions of specified pulse current Multilayer Internal Construction and specified waveform (8/20µs). It is important to note that the peak current and peak voltage may not necessarily be coincidental in time. Leakage Current I L+ In the nonconducting mode, the device is at a very high impedance (approaching 106Ω at its rated working voltage) and appears as an almost open circuit in the system. The leakage current drawn at this level is very low (<25µA at ambient temperature) and, unlike the Zener diode, the multilayer TVS has the added advantage Figure 5 that, when operated up to its maximum temperature, its leakage current will not increase above 500µA. AUML Load Dump Pulsing over a Temperature Range of Nominal Voltage V NDC++ -55ºC to +125ºC This is the voltage at which the AUML enters its conduction state and begins to suppress transients. V(10mA) In the automotive environment this voltage is 35 defined at the 10mA point and has a minimum 2220 = 25J 30 1812 = 6J (V ) and maximum (V ) voltage specified. 1210 = 3J N(DC) MIN N(DC) MAX 25 GE 20 A OLT 15 Additional Information V 10 5 0 0 12 3 4 5 6 7 8 9 10 11 12 Datasheet Resources Samples Figure 6 # OF LOAD DUMPS FIGURE 5. AUML LOAD DUMP PULSING OVER A TEMPERATURE RANGE OF -55˚C TO 125˚C V(10mA) 35 2220 = 25J 1812 = 6J 30 1210 = 3J 25 E G 20 A LT VO 15 10 © 2019 Littelfuse, Inc. 5 Specifications are subject to change without notice. Revised: 06/25/19 0 0 50 100 150 200 250 300 350 1,000 2,000 # OF LOAD DUMPS FIGURE 6. REPETITIVE LOAD DUMP PULSING AT RATED ENERGY V AT 10mA 100 E G A LT O V V18AUMLA2220 10 1000 2000 3000 4000 5000 6000 7000 NUMBER OF PULSES FIGURE 7. REPETITIVE ENERGY TESTING OF THE V18AUMLA2220 AT AN ENERGY LEVEL OF 2 JOULES

Metal-Oxide Varistors (MOVs) Surface Mount Multilayer Varistors (MLVs) > AUML Series Lead (Pb) Soldering Recommendations The principal techniques used for the soldering of Reflow Solder Profile components in surface mount technology are IR Re-flow and Wave soldering. Typical profiles are shown on the right. The termination option available for each solder technique is: 230 Reflow Wave 230 1. Nickel Barrier (preferred) 1. Nickel Barrier (preferred) 2. Silver/Platinum The recommended solder for the AUML suppressor is a 62/36/2 (Sn/Pb/Ag), 60/40 (Sn/Pb) or 63/37 (Sn/Pb). Littelfuse also recommends an RMA solder flux. 230 Wave soldering is the most strenuous of the processes. To avoid the possibility of generating stresses due to Figure 9 thermal shock, a preheat stage in the soldering process FIGURE 8.REFLOW SOLDER PROFILE is recommended, and the peak temperature of the solder process should be rigidly controlled. Wave Solder PrFoIGfiURleE 8.REFLOW SOLDER PROFILE 300 When using a reflow process, care should be taken to ensure that the AUML chip is not subjected to a thermal 235000 MAXIMUM WAVE 260oC gradient steeper than 4 degrees per second; the ideal MAXIMUM WAVE 260oC gprraodcieesnst, bpereinhge 2at idnegg troe ewsi tpheinr s1e0c0o dnedg. rDeuersin ogf tthhee ssoollddeerri'nsg oRE (C)C)222050000 FIGURE 8.REFLOW SOLDER PROFILE oU150 peak temperature is essential to minimize thermal shock. RATRE ( SECOND PREHEAT Once the soldering process has been completed, it TEMPEMPERATU13110505000000 FIRST PMRAEXHIEMAUSTMEC WOANVDE P2R60EoHCEAT is still necessary to ensure that any further thermal E250 T FIRST PREHEAT sshhoocckks i sa rheo ta vporiindteedd. cOirnceu ipt obsosaibrdles cbaeuinsge roefm thoevremd aflr om oE (C)20500000.0 0.5 1.0 1.5TIM2E. 0(MINU2.T5ES)3.0 3.5 4.0 4.5 the solder process and subjected to cleaning solvents UR1500.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Figure 1AT0 FIGURE 9.WATVIMEE S (MOSILNEDCUEOTERNSD P) PRROEFHIELAET at room temperature. The boards must be allowed to R E P100 cool gradually to less than 50ºC before cleaning. M FIGURE 9.WAVE SOLDER PROFILE E T FIRST PREHEAT 50 0 MAXIMUM TEMPERATURE 260˚C Lead–free (Pb-free) Soldering Recommendations 0.0 0.520 - 41.00 SEC1O.5NDS 2W.0ITHIN2 .55˚C 3.0 3.5 4.0 4.5 MAXIMUM TEMTPIMEER (AMTIUNRUETE 2S6)0˚C 20 - 40 SECONDRSA WMPIT HRIANT E5˚C Littelfuse offers the Nickel Barrier Termination finish for the FIGURE 9.WA<V3E˚C S/sOLDER PRO6F0IL - E150 SEC Lead–free Re-flow SolderR PAMroP RfiAlTeE > 217˚C optimum Lead–free solder performance. <3˚C/s 60 - 150 SEC > 217˚C The preferred solder is 96.5/3.0/0.5 (SnAgCu) with an RMA PREHEAT ZONE flux, but there is a wide selection of pastes and fluxes MAXIMUM TEMPERATURE 260˚C available with which the Nickel Barrier parts should be 20 P- R4E0 HSEEACTO ZNODNSE WITHIN 5˚C compatible. RAMP RATE <3˚C/s 5.600 - 1 5 0 6 S.0E C 7.0 > 217˚C The reflow profile must be constrained by the maximums 5.0 6.0 7.0 in the Lead–free Reflow Profile. For Lead–free Wave FIGURE 10. LEAD-FREE RE-FLOW SOLDER PROFILE soldering, the Wave Solder Profile still applies. FIGURE P1R0E.HLEEAATD Z-OFRNEEE RE-FLOW SOLDER PROFILE Note: the Lead–free paste, flux and profile were used for evaluation purposes by Littelfuse, based upon industry standards and practices. There are multiple choices of all 5.0 6.0 7.0 Figure 11 three available, it is advised that the customer explores the optimum combination for their process as processes vary FIGURE 10. LEAD-FREE RE-FLOW SOLDER PROFILE considerably from site to site. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/25/19

Metal-Oxide Varistors (MOVs) Surface Mount Multilayer Varistors (MLVs) > AUML Series Product Dimensions (mm) PAD LAYOUT DIMENSIONS CHIP LAYOUT DIMENSIONS E Note: Avoid metal runs in this area, parts are not recommended for use in applications using silver (Ag) expoxy paste. L D W Note: Avoid metal runs in this area, parts are not recommended for use in applications using Silver (Ag) epoxy paste. 1206 Size 1210 Size 1812 Size 2220 Size SYMBOL IN MM IN MM IN MM IN MM A 0.203 5.150 0.219 5.510 0.272 6.910 0.315 8.000 B 0.103 2.620 0.147 3.730 0.172 4.360 0.240 6.190 C 0.065 1.650 0.073 1.850 0.073 1.850 0.073 1.850 D (max.) 0.071 1.80 0.070 1.80 0.07 1.80 0.118 3.00 E 0.020 -/+ 0.010 0.50 -/+0.25 0.020 -/+ 0.010 0.50 -/+ 0.25 0.020 -/+ 0.010 0.50 -/+ 0.25 0.030 -/+ 0.010 0.75 -/+ 0.25 L 0.125 -/+ 0.012 3.20 -/+ 0.03 0.125 -/+ 0.012 3.20 -/+ 0.30 0.180 -/+ 0.014 4.50 -/+ 0.35 0.225 -/+ 0.016 5.70 -/+ 0.40 W 0.060 -/+ 0.011 1.60 -/+ 0.28 0.100 -/+ 0.012 2.54 -/+ 0.30 0.125 -/+ 0.012 3.20 -/+ 0.30 0.197 -/+ 0.016 5.00 -/+ 0.40 Part Numbering System V 18 AUML A 2220 X X PACKING OPTIONS DEVICE FAMILY A: Bulk Pack, 2500 pieces TVSS Device H: 7in (178mm) Diameter Reel* MAXIMUM DC S: 7in (178mm) Diameter Reel* WORKING VOLTAGE T: 13in (330mm) Diameter Reel* * See quanttities in Packaging table below AUTOMOTIVE END TERMINATION OPTION MULTILAYER DESIGNATOR N or No Letter: Nickel Barrier LOAD DUMP ENERGY RATING DEVICE SIZE INDICATOR i.e., 220 mil x 200 mil Packaging* Quantity Device Size 13 Inch Reel 7 Inch Reel 7 Inch Reel Bulk Pack (‘T’ Option) (‘H’ Option) (‘S’ Option) (‘A’ Option) 1206 10,000 2,500 NA 2,500 1210 8,000 2,000 NA 2,000 1812 4,000 1,000 NA 1,000 2220 4,000 1,000 500 1,000 * It is recommended that the parts be kept in the sealed bag provided and that parts be used as soon as possible when removed from bags. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/25/19

Metal-Oxide Varistors (MOVs) Surface Mount Multilayer Varistors (MLVs) > AUML Series Tape and Reel Specifications Symbol Description Dimensions in Millimeters A Width of Cavity Dependent on Chip Size to Minimize Rotation. 0 B Length of Cavity Dependent on Chip Size to Minimize Rotation. 0 K Depth of Cavity Dependent on Chip Size to Minimize Rotation. 0 W Width of Tape 8 -/+ 0.2 12 -/+ 0.2 F Distance Between Drive Hole Centers and Cavity Centers 3.5 -/+ 0.5 5.4 -/+ 0.5 E Distance Between Drive Hole Centers and Tape Edge 1.75 -/+ 0.1 1.75 -/+ 0.1 P Distance Between Cavity Center 4 -/+ 0.1 8-/+ 0.1 1 P Axial Distance Between Drive Hole Centers and Cavity Centers 2 -/+ 0.1 2 -/+ 0.1 2 P Axial Distance Between Drive Hole Centers 8 -/+ 0.1 8 -/+ 0.1 0 D Drive Hole Diameter 1.55 -/+ 0.05 1.55 -/+ 0.05 0 D Diameter of Cavity Piercing 1.05 -/+ 0.05 1.55 -/+ 0.05 1 T Embossed Tape Thickness 0.3 Max 0.4 Max 1 T Top Tape Thickness 0.1 Max 0.1 Max 2 NOTE: Dimensions in millimeters. • Conforms to EIA-481-1, Revision A • Can be supplied to IEC publication 286-3 Tape 8mm Wide Tape 12mm Wide Tape Chip Size 1206 1210 1812 2220 Standard Packaging Special Packaging Tape and reel is the standard packaging method of the Option1: 178 millimeter (7–inch) reels containing 1000 AUML Series. The standard 300 millimeter (13–inch) reel (2220, 1812), 2000 (1210), 2500 (1206), pieces utilized contains 4000 pieces for the 2200 and 1812 chips, are available. To order add 'H' to the standard 8000 pieces for the 1210 chip and 10,000 pieces for the part number, for example V18AUMLA2220H. 1206 size. Option 2 For small sample quantities (less than 100 To order: add 'T' to the standard part number, for example pieces) the units are shipped bulk pack. To V18AUMLA222OT. order add 'A' to the standard part number, for example V18AUMLA2220A. Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics. © 2019 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/25/19